Superlong JGBs skid after tepid demand at 20-year auction

TOKYO, Jan 24- Japanese government bonds skidded on the long end on Thursday after a lacklustre auction of 20- year bonds, but 10- year futures turned higher on dip-buying after the sale. The Ministry of Finance offered 1.2 trillion yen of 20- year bonds, reopening the number 141 issue with a 1.7 percent coupon, matching that of the past four sales.